High Quality Content by WIKIPEDIA articles! XL-IM is an injection molding technique that uses crosslinking polymerization during molding cycle.. This is a unique single step operation for finished products. The closed cell crosslinked molded foam produced by the Polyolefin elastomers (POE) take advantage of XL-IM providing an innovative technology for shaping foam parts with greater finish, durability and details.For instance a unique molding operation called “Out-Mold-Expansion” (OME) in combination with an emerging crosslinked injection molding technique called XL-IM has been developed and successfully employed in producing injection molded foam parts.